Re: [Amel Yacht Owners] Re: flexible rubber coupling

Danny and Yvonne SIMMS

Hi Bob,
I have not heard that. I have never had a failure in  nearly 8 years. I tighten them to the normal tension for a bolt that size. I am sure, given the loads on this coupling, too loose would allow movement which would lead to wear and failure. Do check the rubber bushes periodically, they do wear out over time.
SM 299 Ocean Pearl

From: "rossidesigngroup@... [amelyachtowners]"
To: amelyachtowners@...
Sent: Wednesday, 19 October 2016 10:17 PM
Subject: [Amel Yacht Owners] Re: flexible rubber coupling

I have heard that the 4 bolts that essentially clamp the Vetus flexible coupling together--between the flange coming out of the transmission and the flange on the shaft of the C drive--should not be tightened too much.  It has even been posted that tightening them too much will cause failure of the bolts.   Is there a rule of thumb for how tight they should be?  Should the entire bolt and nut rotate by hand?  Should there be slack?  Should they be tightened firmly.  I can't seem to find that on the site or in the Vetus literature.


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